A 13-million-year-old leg bone from an enormous flightless bird carries crocodilian tooth marks, showing South America was once a predator-eat-predator world
A 13-million-year-old leg bone from an enormous flightless bird carries crocodilian tooth marks, showing South America was once a predator-eat-predator world A 13-million-year-old leg bone from an enormous flightless bird carries crocodilian tooth marks, showing South America was once a predator-eat-predator world